How to create custom helper in mvc

Here, i will create own control for TextBox and label-

using System;

using System.Collections.Generic;

using System.Linq;

using System.Web;

using System.Web.Mvc;

namespace CustomControlInMVC

{

    public static class htmlControl

    {

        public static MvcHtmlString myTextBox(this HtmlHelper helper, string name)

        {

            string str = "<input type=\"text\" name="+ name + " id="+ name + " />";

            return new MvcHtmlString(str);

        }

        public static MvcHtmlString myLabel(this HtmlHelper helper, string name, string content)

        {

            string str = string.Format("<lable class='color:red' name=" + name + " id=" + name + ">{0}</label>", content);

            return new MvcHtmlString(str);

        }

    }

}

using controls like-

 <div>

        @Html.myTextBox("txtMyTextBox")

        @Html.myLabel("lbl", "This is custom label")

    </div>